Monroe and Sakura retire, leaving a new earth sciences club run by Mira, Ao, and Ino. In order to build Ino's confidence as their president, they agree to hold a lecture for a children's star-viewing.
Mira and others struggle to get the uncooperative children interested in the activity. Later, Ao is absent from school the morning after she watches the Orionid meteor shower. Mira and Ino visit her out of concern, but...
The three of them form the constellation 
known as the Summer Triangle.
تندمج هذه النجوم الثلاثة لتشكّل كوكبة
تُعرف باسم مثلّث الصيف
Diese drei Sterne bilden zusammen
das sogenannte Sommerdreieck.
Si las unen se forma
el Triángulo de Verano.
Si las unís se forma
el Triángulo de Verano.
Si on relie les trois,
on forme le Triangle d’été.
Queste tre stelle formano la costellazione
chiamata "Triangolo Estivo".
Essas estrelas formam a constelação
conhecida como Triângulo de Verão.
Вместе они образуют 
Летне-осенний треугольник.